NYC-WTC_000228991

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group 7797 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 16 Grid Opening Size: 0.01124 Client Sample#: 16 Area Examined: 0.04496 ntm^

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date; 5/19/02

Analysis Performed By: MARK PEYSAKHOV

GO, Structure T Structure Type Length IO of Structure N or "v EDS I No >i05p T ;>=5pj (Nonadb i F B C M Chrys Amphibcte Nonasb Annbig/ND No Coord Elemeits) ! <5p -------------- i

2= 3 e=>z--

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f

I I Struct = >0.5p >5:1 Aspect Ratio Grid accapiance; 4= Positive diffracdon pattern properties conforming to <50% undissolved filtfif, overlapped or folded Totals laboratory idenlificauoc criteria observed <10% particulate coverage >50% coverage ate least 20 unfoidad dr overiapped grid apuares <5% F B C M >5iJ 4= EOS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite Ambiguous B ’ Bundle (<3 fibers <1 fiber diameter apart Crocidolite C = Cluster (>3 (ntersectlorrst Anthophyllite Non-Asbestos Tremolite W = Matrix Actinolite Non-Identified NSD = No Structures Detected

CITY_21MC100_002902009

NYC-WTC_000228991